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Curvature-Controlled Polarization in Adaptive Ferroelectric Membranes
Greta Segantini, Ludovica Tovaglieri, Chang Jae Roh +12
In this study, we explore the ferroelectric domain structure and mechanical properties of PbTiO-based membranes, which develops a well-ordered and crystallographic-oriented rip…
Electron-Beam Writing of Atomic-Scale Reconstructions at Oxide Interfaces
Greta Segantini, Chih-Ying Hsu, Carl Willem Rischau +6
The epitaxial growth of complex oxides enables the production of high-quality films, yet substrate choice is restricted to certain symmetry and lattice parameters, thereby limiting…
Engineering Symmetry Breaking Interfaces by Nanoscale Structural-Energetics in Orthorhombic Perovskite Thin Films
Duncan T. L. Alexander, Hugo Meley, Michael Marcus Schmitt +4
The atomic configuration of phases and their interfaces is fundamental to materials design and engineering. Here, we unveil a transition metal oxide interface, whose formation is d…
Thermal and electrostatic tuning of surface phonon-polaritons in LaAlO3/SrTiO3 heterostructures
Yixi Zhou, Adrien Waelchli, Margherita Boselli +12
Phonon polaritons are promising for infrared applications due to a strong light-matter coupling and subwavelength energy confinement they offer. Yet, the spectral narrowness of the…
Characteristic lengthscales of the electrically-induced insulator-to-metal transition
Theodor Luibrand, Adrien Bercher, Rodolfo Rocco +16
Some correlated materials display an insulator-to-metal transition as the temperature is increased. In most cases this transition can also be induced electrically, resulting in vol…
A Laser-ARPES View of the 2D Electron Systems at LaAlO3/SrTiO3 and Al/SrTiO3 Interfaces
Siobhan McKeown Walker, Margherita Boselli, Emanuel A. Martínez +3
We have measured the electronic structure of the two-dimensional electron system (2DES) found at the Al/SrTiO3 (Al/STO) and LaAlO3/SrTiO3 (LAO/STO) interfaces by means of laser ang…
Layered Metals as Polarized Transparent Conductors
Carsten Putzke, Chunyu Guo, Vincent Plisson +14
The quest to improve transparent conductors balances two key goals: increasing electrical conductivity and increasing optical transparency. To improve both simultaneously is hinder…
Coupling lattice instabilities across the interface in ultrathin oxide heterostructures
T. C. van Thiel, J. Fowlie, C. Autieri +5
Oxide heterointerfaces constitute a rich platform for realizing novel functionalities in condensed matter. A key aspect is the strong link between structural and electronic propert…
Probing Quantum Confinement and Electronic Structure at Polar Oxide Interfaces
Danfeng Li, Sébastien Lemal, Stefano Gariglio +5
Polar discontinuities occurring at interfaces between two different materials constitute both a challenge and an opportunity in the study and application of a variety of devices. I…
Sequential pulsed laser deposition of homoepitaxial SrTiO thin films
D. J. Groenendijk, S. Gariglio
Control of thin film stoichiometry is of primary relevance to achieve desired functionality. Pulsed laser deposition ablating from binary-oxide targets (sequential deposition) can…
Fabricating Superconducting Interfaces between Artificially-Grown LaAlO and SrTiO Thin Films
Danfeng Li, Stefano Gariglio, Claudia Cancellieri +3
Realization of a fully metallic two-dimensional electron gas at the interface between artificially-grown LaAlO and SrTiO thin films has been an exciting challenge. Here we…
Growth-induced electron mobility enhancement at the LaAlO/SrTiO interface
A. Fête, C. Cancellieri, D. Li +4
We have studied the electronic properties of the 2D electron liquid present at the LaAlO/SrTiO interface in series of samples prepared at different growth temperatures. We…
Ferromagnetism and Ferroelectricity in epitaxial ultra-thin BiMnO3 films
G. M. De Luca, D. Preziosi, F. Chiarella +4
We studied the ferroelectric and ferromagnetic properties of compressive strained and unstrained BiMnO3 thin films grown by rf-magnetron sputtering. BiMnO3 samples exhibit a 2D cub…
Conduction at domain walls in insulating Pb(ZrTi)O thin films
J. Guyonnet, I. Gaponenko, S. Gariglio +1
Among the recent discoveries of domain wall functionalities, the observation of electrical conduction at ferroelectric domain walls in the multiferroic insulator BiFeO3 has opened…
Intrinsic origin of the two-dimensional electron gas at polar oxide interfaces
M. L. Reinle-Schmitt, C. Cancellieri, D. Li +8
The predictions of the polar catastrophe scenario to explain the occurrence of a metallic interface in heterostructures of the solid solution(LaAlO)(SrTiO) (L…
Metal-insulator transition in ultrathin LaNiO3 films
R. Scherwitzl, S. Gariglio, M. Gabay +3
Transport in ultrathin films of LaNiO3 evolves from a metallic to a strongly localized character as the film's thickness is reduced and the sheet resistance reaches a value close t…
Two-dimensional quantum oscillations of the conductance at LaAlO3/SrTiO3 interfaces
A. D. Caviglia, S. Gariglio, C. Cancellieri +6
We report on a study of magnetotransport in LaAlO3/SrTiO3 interfaces characterized by mobilities of the order of several thousands cm/Vs. We observe Shubnikov-de Haas oscilla…
Diodes with Breakdown Voltages Enhanced by the Metal-Insulator Transition of LaAlO-SrTiO Interfaces
R. Jany, M. Breitschaft, G. Hammerl +10
Using the metal-insulator transition that takes place as a function of carrier density at the LaAlO-SrTiO interface, oxide diodes have been fabricated with room-temperature…
Shear effects in lateral piezoresponse force microscopy at 180 ferroelectric domain walls
J. Guyonnet, H. Bea, F. Guy +5
In studies using piezoresponse force microscopy, we observe a non-zero lateral piezoresponse at 180 domain walls in out-of-plane polarized, c-axis-oriented tetragonal ferro…
Epitaxial Growth of Multiferroic YMnO3 on GaN
A. Posadas, J. -B. Yau, J. Han +5
In this work, we report on the epitaxial growth of multiferroic YMnO3 on GaN. Both materials are hexagonal with a nominal lattice mismatch of 4%, yet x-ray diffraction reveals an u…